diff --git a/cbc.c b/cbc.c
index cee710937b2a4d683d726dc6cac720d0d6f06bfc..6bd9f9ae476c14f82432d45d35bce509c25fd63f 100644
--- a/cbc.c
+++ b/cbc.c
@@ -52,7 +52,7 @@ cbc_encrypt(void *ctx, nettle_crypt_func f,
     }
 }
 
-/* Reqires that dst != src */
+/* Requires that dst != src */
 static void
 cbc_decrypt_internal(void *ctx, nettle_crypt_func f,
 		     unsigned block_size, uint8_t *iv,